Title:
Concrete Q&A: Synthetic Air-Entraining Admixtures and Air Content Requirements/Recommendations
Author(s):
Michael A. Caldarone, Lawrence R. Roberts, and Emmanuel K. Attiogbe
Publication:
Concrete International
Volume:
43
Issue:
12
Appears on pages(s):
71-72
Keywords:
DOI:
Date:
12/1/2021
Abstract:
Q. I recently conducted an extensive review of concrete industry standards for requirements and recommendations for air contents specified for freezing-and-thawing durability. Unfortunately, my review shows that the requirements/recommendations included in ACI documents and ASTM standards do not reflect the use of synthetic air-entraining admixtures (AEAs). Rather, these requirements/recommendations are based on concrete mixtures prepared using neutralized vinsol resin AEA, which creates a different air-void system than synthetic AEAs. How can I adjust air content requirements in my specifications to accommodate the use of synthetic AEAs and still meet the requirements/recommendations included in ACI and ASTM documents?